Drawing from interdependence theory and focal participants (anchors) and their intimate partners who remained coupled at Waves 1, 3, and 5 of the German Family Panel (pairfam; N = 1,543), the authors examined the temporal ordering between anchor and partner supportive dyadic coping with anchor commitment and willingness to sacrifice for an intimate partner. Autoregressive cross‐lagged modeling analyses revealed that anchor and partner supportive dyadic coping predicted higher levels of commitment and willingness to sacrifice, and willingness to sacrifice predicted less supportive dyadic coping only for anchors. There were no longitudinal associations between commitment and willingness to sacrifice, and gender did not moderate associations among the variables.